在c＃by参数中创建方法编号生成器

Question

I tried to Create a method to get value from the user then make a number generator of those values as a parameter but I Did not knew how !

 //create a method that genereted the number of taple game
  public void zahra() 
  {
        Console.WriteLine("please enter value to random them betwen ");
        Console.Write("from ");
        ran    = Convert.ToInt32(Console.ReadLine());
        Console.Write("\n to ");
        to = Convert.ToInt32(Console.ReadLine());
        to++;
  }

Answer 1

You could try:

// declare random instance outside of the method 
// because we don't want duplicate numbers
static Random rnd = new Random();

public static int GenerateRandomNumber()
{
    // declare variables to store range of number
    int from, to;

    // use while(true) and force user to enter valid numbers
    while(true)
    {
        // we use TryParse in order to avoid FormatException and validate the input
        bool a = int.TryParse(Console.ReadLine(), out from);
        bool b = int.TryParse(Console.ReadLine(), out to);

        // check values and ensure that 'to' is greater than 'from'
        // otherwise we will get a ArgumentOutOfRangeException on rnd.Next

        if(a && b && from < to) break; // if condition satisfies break the loop

        // otherwise display a message and ask for input again
        else Console.WriteLine("You have entered invalid numbers, please try again.");
    }

    // generate a random number and return it
    return rnd.Next(from, to + 1);

}

Answer 2

You can add in the end of your script:

 Random r=new Random();
 Console.WriteLine(r.Next(ran, to));

of course you should declare ran and to as int.

edit:This is my whole project code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace RND
{
class Program
{
    static void Main(string[] args)
    {
        zahra();
    }
    public static void zahra()
    {
        Console.WriteLine("please enter value to random them betwen ");
        Console.Write("from ");
        int ran = Convert.ToInt32(Console.ReadLine());
        Console.Write("\n to ");
        int to = Convert.ToInt32(Console.ReadLine());
        to++;

        Random r=new Random();
        Console.WriteLine(r.Next(ran, to));
    }
}
}